12.6 – Thermochemistry additional practice
1. How much energy is needed to raise the temperature of a .12 kg sample of aluminum from 200 C to 420
C?
2. If 6780 J of energy are added to a 13.5 g sample of water at 290 C, what is the final temperature of the
water (K)?
3. You need 0.7 kJ to raise the temperature of a .067 kg sample 5 K. What is the specific heat of the
sample? What is this sample more than likely?
4. Calculate the specific heat of 2.3 mol of silver, given that 1 mol absorbs 50 J and increases the
temperature from 285 K to 305 K.
5. How much energy is needed to raise the temperature of a 449 g sample of water from 210 C to 230 C?
6. If 237 J of energy are added to a .45 kg sample of water at 280 C, what is the final temperature of the
water (K)?
7. You need .056 kJ to raise the temperature of a 40 g sample 10 K. What is the specific heat of the
sample? What is this sample more than likely?
8. Calculate the specific heat of 1 mol of chromium, given that 1 mol absorbs 51 J and increases the
temperature from 283 K to 287 K.
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